My iBook G4 struggles to turn on, why?

I recently got this thing. It started at OS X 10.5.1 and I updated it to OS X 10.5.8 almost immediately. It was running like a dream last night (I have had it less than 24 hours) and then I shut it down for the night and left it to charge. This morning when I tried to turn it on, pressing the power normally did nothing. I held down the power and it made this loud BEEEEP and then the ready light flashed a few times. Still nothing. I repeated doing this about 4 times before it got to where it is now, up and running. Is there a reason for this? Is it the updated system? I barely put ANYTHING on the hard-drive memory wise, I just have a few pictures on here as of now and some small video files, not even full movies. That's it. Is it defective? Should I be contacting the seller over this? Or is it something I've done to it?

The power on self-test resides in the ROM of the computer. This test runs whenever the computer is turned on after being fully shut down (the power-on self-test does not run if the computer is only restarted).

If a fault is detected during the test, you will not hear a normal startup chime. Instead, the system will beep as explained below. If you experience one of these beeps, you may call your Apple Authorized Service Provider for additional troubleshooting assistance.

In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.

There could be any number of reasons why your iBook done that. It could be something a simple as a loose or faulty memory module installed under your keyboard. What I suggest you try doing is resetting the PMU should this happen again. If you continue to experience this problem, then I would run he Apple hardware test just to get some diagnostics on this fault.

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